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Ghaderi S, Levkau B. An erythrocyte-centric view on the MFSD2B sphingosine-1-phosphate transporter. Pharmacol Ther 2023; 249:108483. [PMID: 37390971 DOI: 10.1016/j.pharmthera.2023.108483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/12/2023] [Accepted: 06/26/2023] [Indexed: 07/02/2023]
Abstract
MFSD2B has been identified as the exclusive sphingosine-1-phosphate (S1P) transporter in red blood cells (RBC) and platelets. MFSD2B-mediated S1P export from platelets is required for aggregation and thrombus formation, whereas RBC MFSD2B maintains plasma S1P levels in concert with SPNS2, the vascular and lymphatic endothelial cell S1P exporter, to control endothelial permeability and ensure normal vascular development. However, the physiological function of MFSD2B in RBC remains rather elusive despite mounting evidence that the intracellular S1P pool plays important roles in RBC glycolysis, adaptation to hypoxia and the regulation of cell shape, hydration, and cytoskeletal organisation. The large accumulation of S1P and sphingosine in MFSD2B-deficient RBC coincides with stomatocytosis and membrane abnormalities, the reasons for which have remained obscure. MFS family members transport substrates in a cation-dependent manner along electrochemical gradients, and disturbances in cation permeability are known to alter cell hydration and shape in RBC. Furthermore, the mfsd2 gene is a transcriptional target of GATA together with mylk3, the gene encoding myosin light chain kinase (MYLK). S1P is known to activate MYLK and thereby impact on myosin phosphorylation and cytoskeletal architecture. This suggests that metabolic, transcriptional and functional interactions may exist between MFSD2B-mediated S1P transport and RBC deformability. Here, we review the evidence for such interactions and the implications for RBC homeostasis.
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Affiliation(s)
- Shahrooz Ghaderi
- Institute of Molecular Medicine III, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Germany
| | - Bodo Levkau
- Institute of Molecular Medicine III, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Germany.
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2
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Suljević D, Ibragić S, Mitrašinović-Brulić M, Fočak M. Evaluating the effects of anticoagulant rodenticide bromadiolone in Wistar rats co-exposed to vitamin K: impact on blood-liver axis and brain oxidative status. Mol Cell Biochem 2021; 477:525-536. [PMID: 34816338 DOI: 10.1007/s11010-021-04303-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/17/2021] [Indexed: 10/19/2022]
Abstract
The aim of this study was to investigate the beneficial effects of vitamin K relate to protection against detrimental effects of bromadiolone. Wistar rats (n = 30) were divided in three groups (n = 10): control group and two groups treated with bromadiolone (0.12 mg/kg) and bromadiolone + vitamin K (0.12 mg/kg + 100 mg/kg) over the period of four days. The main findings in the bromadiolone-exposed rats, such as damaged hepatocytes, high levels of globulin, total proteins and lymphocytes, and altered albumin/globulin ratio, collectively indicate an acute inflammatory process. Morphological changes in erythrocytes include microcytosis, hypochromia, hyperchromia, hemolysis, stomatocytosis, and spherocytosis. Significantly low values of RBC, Hct, and hemoglobin concentrations indicate impairments of the hematopoietic pathway causing combined anemia. The selected dose of bromadiolone caused a non-significant increase of catalase activity and a significant increase of the total protein content in brain tissue homogenates. Vitamin K supplementation reduced many of the harmful effects of bromadiolone. The cytoprotective role of vitamin K was proved to be of great importance for the preservation of structural changes on the membranes of hepatocytes and erythrocytes, in addition to the known role in the treatment of coagulopathies. The results of the study suggest valuable properties of vitamin K in the prevention and treatment of various types of anemia caused by bromadiolone toxicity. Future research is necessary to determine the adequate dose and treatment duration with vitamin K in disorders caused by the cumulative action of bromadiolone and possibly other pesticides.
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Affiliation(s)
- Damir Suljević
- Faculty of Science, Department of Biology, University of Sarajevo, Sarajevo, Bosnia and Herzegovina.
| | - Saida Ibragić
- Faculty of Science, Department of Chemistry, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Maja Mitrašinović-Brulić
- Faculty of Science, Department of Biology, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Muhamed Fočak
- Faculty of Science, Department of Biology, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
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Kaya Z, Sal E, Yorulmaz A, Hsieh YP, Gülen H, Yıldırım AT, Niu DM, Tekin A. Genetic basis and hematologic manifestations of sitosterolemia in a group of Turkish patients. J Clin Lipidol 2021; 15:690-698. [PMID: 34304999 DOI: 10.1016/j.jacl.2021.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 06/30/2021] [Accepted: 07/04/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Sitosterolemia is a rare lipid disorder caused by mutations in adenosine triphosphate-binding cassette genes (ABCG) 5 and 8. OBJECTIVE To evaluate the phenotypic/genotypic features of sitosterolemia in a group of Turkish patients. METHODS Seven probands with unexplained hematologic abnormalities and their 13 relatives were enrolled. Sterol levels were measured by gas chromatography and genetic studies were performed using Sanger sequencing. Individuals were diagnosed with sitosterolemia if they were found to have frankly elevated sitosterol level >15 μg/mL and/or pathogenic variants of the ABCG5/ABCG8. RESULTS The seven probands and their six relatives were diagnosed with frank sitosterolemia, and all these patients had hematologic abnormalities. The remaining seven relatives were asymptomatic heterozygous carriers. Three novel variants in the ABCG5 gene (c.161G>A, c.1375C>T, IVS10-1G>T), one novel variant in the ABCG8 gene (c.1762G>C) and one known variant in the ABCG5 gene (c.1336 C>T) were identified. No variant was identified in one case. The mean sitosterol level was significantly higher and mean platelet count was significantly lower in patients with homozygous variants compared to heterozygous variants (p<0.05, for all). Diets low in plant sterols were recommended for 13 symptomatic cases. Four homozygotes received ezetimibe, and their splenomegaly, anemia, and thrombocytopenia completely resolved except one. CONCLUSION The five pathogenic variants identified in this study indicate the genetic heterogeneity of sitosterolemia in Turkish population. Patients with unexplained hematologic abnormalities (specifically macrothrombocytopenia) should have their sterol level measured as initial testing. Ezetimibe can be a good choice for sitosterolemia.
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Affiliation(s)
- Zühre Kaya
- Department of Pediatric Hematology, Gazi University Faculty of Medicine, Besevler, Ankara 06500, Turkey.
| | - Ertan Sal
- Department of Pediatric Hematology, Gazi University Faculty of Medicine, Besevler, Ankara 06500, Turkey
| | - Aslı Yorulmaz
- Department of Food Engineering, Adnan Menderes University, Faculty of Engineering, Aydın, Turkey
| | - Yu-Ping Hsieh
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hüseyin Gülen
- Department of Pediatric Hematology, Manisa Celal Bayar University Faculty of Medicine, Turkey
| | - Ayşen Türedi Yıldırım
- Department of Pediatric Hematology, Manisa Celal Bayar University Faculty of Medicine, Turkey
| | - Dau-Ming Niu
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Pediatrics, Taipei Veterans General Hospital, Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Aziz Tekin
- Department of Food Engineering, Ankara University, Faculty of Engineering, Ankara, Turkey
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Abstract
Glucose transport is intimately linked to red blood cell physiology. Glucose is the unique energy source for these cells, and defects in glucose metabolism or transport activity are associated with impaired red blood cell morphology and deformability leading to reduced lifespan. In vertebrate erythrocytes, glucose transport is mediated by GLUT1 (in humans) or GLUT4 transporters. These proteins also account for dehydroascorbic acid (DHA) transport through erythrocyte membrane. The peculiarities of glucose transporters and the red blood cell pathologies involving GLUT1 are summarized in the present review.
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Affiliation(s)
- Hélène Guizouarn
- Université Côte d'Azur, CNRS, Inserm, Institut de Biologie Valrose, 28 av. Valrose, 06100, Nice, France.
| | - Benoit Allegrini
- Université Côte d'Azur, CNRS, Inserm, Institut de Biologie Valrose, 28 av. Valrose, 06100, Nice, France
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Tzavella E, Hatzimichael E, Kostara C, Bairaktari E, Elisaf M, Tsimihodimos V. Sitosterolemia: A multifaceted metabolic disorder with important clinical consequences. J Clin Lipidol 2017; 11:1095-1100. [PMID: 28545928 DOI: 10.1016/j.jacl.2017.04.116] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 04/24/2017] [Indexed: 10/19/2022]
Abstract
Sitosterolemia is a metabolic disorder characterized by increased intestinal absorption and tissue accumulation of phytosterols. Although sitosterolemia is considered a rare disease, its prevalence may be significantly higher than initially thought. Indeed, accumulating evidence suggests that patients with unexplained hematologic abnormalities or premature cardiovascular disease in the absence of classic risk factors may exhibit disordered phytosterol metabolism. In this review, we present a patient with sitosterolemia, describe the pathophysiology and the clinical picture of this disorder, and discuss the clinical value of phytosterol supplementation in patients with primary dyslipidemias.
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Affiliation(s)
- Eleftheria Tzavella
- Department of Internal Medicine, School of Medicine, University of Ioannina, Ioannina, Greece
| | | | - Christina Kostara
- Laboratory of Clinical Chemistry, University of Ioannina, Ioannina, Greece
| | - Eleni Bairaktari
- Laboratory of Clinical Chemistry, University of Ioannina, Ioannina, Greece
| | - Moses Elisaf
- Department of Internal Medicine, School of Medicine, University of Ioannina, Ioannina, Greece
| | - Vasilis Tsimihodimos
- Department of Internal Medicine, School of Medicine, University of Ioannina, Ioannina, Greece.
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Abstract
Genetic defects of erythrocyte transport proteins cause disorders of red blood cell volume that are characterized by abnormal permeability to the cations Na(+) and K(+) and, consequently, by changes in red cell hydration. Clinically, these disorders are associated with chronic haemolytic anaemia of variable severity and significant co-morbidities, such as iron overload. This review provides an overview of recent insights into the molecular basis of this group of rare anaemias involving cation channels and transporters dysfunction. To date, a total of 5 different membrane proteins have been reported to be responsible for volume homeostasis alteration when mutated, 3 of them leading to overhydrated cells (AE1 [also termed SLC4A1], RHAG and GLUT1 [also termed SCL2A1) and 2 others to dehydrated cells (PIEZO1 and the Gardos Channel). These findings are not only of basic scientific interest, but also of direct clinical significance for improving diagnostic procedures and identify potential approaches for novel therapeutic strategies.
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Affiliation(s)
- Catherine Badens
- APHM Department of Medical Genetics, Hôpital de la Timone, Aix Marseille Univ, INSERM, GMGF, Marseille, France
| | - Hélène Guizouarn
- Univ. Nice Sophia Antipolis, CNRS, Inserm, iBV, 06100 Nice, France
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Imashuku S, Muramatsu H, Sugihara T, Okuno Y, Wang X, Yoshida K, Kato A, Kato K, Tatsumi Y, Hattori A, Kita S, Oe K, Sueyoshi A, Usui T, Shiraishi Y, Chiba K, Tanaka H, Miyano S, Ogawa S, Kojima S, Kanno H. PIEZO1 gene mutation in a Japanese family with hereditary high phosphatidylcholine hemolytic anemia and hemochromatosis-induced diabetes mellitus. Int J Hematol 2016; 104:125-9. [PMID: 26971963 DOI: 10.1007/s12185-016-1970-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/01/2016] [Accepted: 03/02/2016] [Indexed: 12/26/2022]
Abstract
Hereditary xerocytosis (HX) or dehydrated hereditary stomatocytosis (DHS) [OMIM 194380], in which PIEZO1 gene mutation has recently been identified, is difficult to diagnose. We report here the discovery of a PIEZO1 gene mutation in a Japanese family (father, daughter, and son) who were previously diagnosed with hereditary high phosphatidylcholine hemolytic anemia (HPCHA). All of the affected family members had non-spherocytic hemolytic anemia associated with severe hemochromatosis-related diabetes mellitus. Although the causative correlation between HPCHA and PIEZO1-gene mutated HX/DHS remains to be clarified, our findings raise an important question as to whether any of the HPCHA cases previously diagnosed in Japan may have in fact been the form of hemolytic anemia known as HX/DHS with PIEZO1 gene mutation.
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Affiliation(s)
- Shinsaku Imashuku
- Divisions of Laboratory Medicine or Internal Medicine, Uji-Tokushukai Medical Center, Uji-Tokushukai Medical Center, 145 Ishibashi, Makishima-cho, Uji, Kyoto, 611-0041, Japan.
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takashi Sugihara
- Department of Hematology, Kawasaki Medical School, Kurashiki, Japan
| | - Yusuke Okuno
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Xinan Wang
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenichi Yoshida
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ayako Kato
- Laboratory of Medicine, Aichi Gakuin University School of Pharmacy, Nagoya, Japan
| | - Koichi Kato
- Laboratory of Medicine, Aichi Gakuin University School of Pharmacy, Nagoya, Japan
| | - Yasuaki Tatsumi
- Laboratory of Medicine, Aichi Gakuin University School of Pharmacy, Nagoya, Japan
| | - Ai Hattori
- Department of Hospital Pharmacy, Nagoya University, Nagoya, Japan
| | - Shinya Kita
- Divisions of Laboratory Medicine or Internal Medicine, Uji-Tokushukai Medical Center, Uji-Tokushukai Medical Center, 145 Ishibashi, Makishima-cho, Uji, Kyoto, 611-0041, Japan
| | - Keishi Oe
- Divisions of Laboratory Medicine or Internal Medicine, Uji-Tokushukai Medical Center, Uji-Tokushukai Medical Center, 145 Ishibashi, Makishima-cho, Uji, Kyoto, 611-0041, Japan
| | - Atsushi Sueyoshi
- Divisions of Laboratory Medicine or Internal Medicine, Uji-Tokushukai Medical Center, Uji-Tokushukai Medical Center, 145 Ishibashi, Makishima-cho, Uji, Kyoto, 611-0041, Japan
| | - Takeshi Usui
- Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Yuichi Shiraishi
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kenichi Chiba
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hiroko Tanaka
- Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Satoru Miyano
- Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Health Intelligence Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hitoshi Kanno
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
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Yabas M, Coupland LA, Cromer D, Winterberg M, Teoh NC, D'Rozario J, Kirk K, Bröer S, Parish CR, Enders A. Mice deficient in the putative phospholipid flippase ATP11C exhibit altered erythrocyte shape, anemia, and reduced erythrocyte life span. J Biol Chem 2014; 289:19531-7. [PMID: 24898253 DOI: 10.1074/jbc.c114.570267] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Transmembrane lipid transporters are believed to establish and maintain phospholipid asymmetry in biological membranes; however, little is known about the in vivo function of the specific transporters involved. Here, we report that developing erythrocytes from mice lacking the putative phosphatidylserine flippase ATP11C showed a lower rate of PS translocation in vitro compared with erythrocytes from wild-type littermates. Furthermore, the mutant mice had an elevated percentage of phosphatidylserine-exposing mature erythrocytes in the periphery. Although erythrocyte development in ATP11C-deficient mice was normal, the mature erythrocytes had an abnormal shape (stomatocytosis), and the life span of mature erythrocytes was shortened relative to that in control littermates, resulting in anemia in the mutant mice. Thus, our findings uncover an essential role for ATP11C in erythrocyte morphology and survival and provide a new candidate for the rare inherited blood disorder stomatocytosis with uncompensated anemia.
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Affiliation(s)
- Mehmet Yabas
- From the Ramaciotti Immunization Genomics Laboratory and
| | - Lucy A Coupland
- Cancer and Vascular Biology Group, Department of Immunology, The John Curtin School of Medical Research, and the Clinical Haematology Unit, The Canberra Hospital, Canberra, Australian Capital Territory 2605, Australia
| | - Deborah Cromer
- the Complex Systems in Biology Group, Centre for Vascular Research, University of New South Wales, Kensington, New South Wales 2052, Australia, and
| | - Markus Winterberg
- the Division of Biomedical Science and Biochemistry, Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Narci C Teoh
- the Liver Research Group, Australian National University Medical School at the Canberra Hospital, Canberra, Australian Capital Territory 2605, Australia
| | - James D'Rozario
- the Clinical Haematology Unit, The Canberra Hospital, Canberra, Australian Capital Territory 2605, Australia
| | - Kiaran Kirk
- the Division of Biomedical Science and Biochemistry, Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Stefan Bröer
- the Division of Biomedical Science and Biochemistry, Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Christopher R Parish
- Cancer and Vascular Biology Group, Department of Immunology, The John Curtin School of Medical Research, and
| | - Anselm Enders
- From the Ramaciotti Immunization Genomics Laboratory and
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Abstract
Hereditary spherocytosis and elliptocytosis are the two most common inherited red cell membrane disorders resulting from mutations in genes encoding various red cell membrane and skeletal proteins. Red cell membrane, a composite structure composed of lipid bilayer linked to spectrin-based membrane skeleton is responsible for the unique features of flexibility and mechanical stability of the cell. Defects in various proteins involved in linking the lipid bilayer to membrane skeleton result in loss in membrane cohesion leading to surface area loss and hereditary spherocytosis while defects in proteins involved in lateral interactions of the spectrin-based skeleton lead to decreased mechanical stability, membrane fragmentation and hereditary elliptocytosis. The disease severity is primarily dependent on the extent of membrane surface area loss. Both these diseases can be readily diagnosed by various laboratory approaches that include red blood cell cytology, flow cytometry, ektacytometry, electrophoresis of the red cell membrane proteins, and mutational analysis of gene encoding red cell membrane proteins.
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Affiliation(s)
- Lydie Da Costa
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris, F-75019, France.
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